200 entries under adjective topic. ×
| required(right, important, capital, essential) | |
| essential(noun, body, material, big) | |
| requisite(noun, important, want, need) | |
| indispensable(important, significant, original, essential) | |
| vital(body, material, big, important) | |
| obligatory(sound, right, essential, obligation) | |
| fundamental(noun, body, material, important) | |
| imperative(important, essential, critical, vital) | |
| compulsory(cruel, essential, pitiless, obligation) | |
| important(significant, original, substantial, serious) | |
| prerequisite(noun, important, want, need) | |
| unavoidable(regular, essential, obvious, bound) | |
| urgent(important, substantial, valuable, essential) | |
| crucial(big, important, significant, original) | |
| needful(set, important, original, capital) | |
| organic(important, significant, natural, animate) | |
| mandatory(right, essential, obvious, obligation) | |
| inevitable(certain, regular, obvious, expected) | |
| needed(essential, important, critical, verb) | |
| basic(noun, body, material, important) |
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| APA | Smart Define. (2015). necessary thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/necessary/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "necessary thesaurus" https://smartdefine.org/necessary/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, necessary thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/necessary/thesaurus/synonyms>. |
| MLA | Smart Define. "necessary thesaurus" 2 November 2015. Web. 22 September 2026. <https://smartdefine.org/necessary/thesaurus/synonyms> |